path: root/LedgerSMB/User.pm

#=====================================================================
# LedgerSMB 
# Small Medium Business Accounting software
# http://www.ledgersmb.org/
# 
# Copyright (C) 2006
# This work contains copyrighted information from a number of sources all used
# with permission.
#
# This file contains source code included with or based on SQL-Ledger which
# is Copyright Dieter Simader and DWS Systems Inc. 2000-2005 and licensed
# under the GNU General Public License version 2 or, at your option, any later
# version.  For a full list including contact information of contributors,
# maintainers, and copyright holders, see the CONTRIBUTORS file.
#
# Original Copyright Notice from SQL-Ledger 2.6.17 (before the fork):
# Copyright (C) 2000
#
#  Author: DWS Systems Inc.
#     Web: http://www.sql-ledger.org
# 
#  Contributors: Jim Rawlings <jim@your-dba.com>
#
#======================================================================
#
# This file has undergone whitespace cleanup.
#
#======================================================================
#
# user related functions
#
#=====================================================================

package LedgerSMB::User;
use LedgerSMB::Sysconfig;
use LedgerSMB::Session;
use Data::Dumper; 

sub new {
    
    my ($type, $login) = @_;
    my $self = {};

    if ($login ne "") {

        # use central db
        my $dbh = ${LedgerSMB::Sysconfig::GLOBALDBH};
  
        # for now, this is querying the table directly... ugly 
        my $fetchUserPrefs = $dbh->prepare("SELECT acs, address, businessnumber,
                                                   company, countrycode, currency,
                                                   dateformat, dbdriver, dbhost, dbname, 
                                                   dboptions, dbpasswd, dbport, dbuser, 
                                                   email, fax, menuwidth, name, numberformat, 
                                                   password, print, printer, role, sid, 
                                                   signature, stylesheet, tel, templates, 
                                                   timeout, vclimit, u.username
                                              FROM users_conf as uc, users as u
                                             WHERE u.username =  ?
                                               AND u.id = uc.id;");

        $fetchUserPrefs->execute($login);

        my $userHashRef = $fetchUserPrefs->fetchrow_hashref;

        while ( my ($key, $value) = each(%{$userHashRef}) ) {
            $self->{$key} = $value;
        }

        chomp($self->{dbport});
        chomp($self->{dbname});
        chomp($self->{dbhost});

        if(! int($self->{dbport})){#in case there's a space or junk in the dbport
            $self->{dbport} = '5432';
        }

        $self->{dbconnect} = 'dbi:Pg:dbname='.$self->{dbname}.';host='.$self->{dbhost}.';port='.$self->{dbport};

        if($self->{username}){
            $self->{login} = $login;
        }
    }
  
    bless $self, $type;
}

sub country_codes {
    use Locale::Country;
    use Locale::Language;

    my %cc = ();
    
    # scan the locale directory and read in the LANGUAGE files
    opendir DIR, "${LedgerSMB::Sysconfig::localepath}";

    my @dir = grep !/^\..*$/, readdir DIR;

    foreach my $dir (@dir) {
        $dir = substr($dir, 0, -3);
        $cc{$dir} = code2language(substr($dir, 0, 2));
        $cc{$dir} .= ("/" . code2country(substr($dir, 3, 2)))
            if length($dir) > 2;
        $cc{$dir} .= (" " . substr($dir, 6)) if length($dir) > 5;
    }

    closedir(DIR);

    %cc;

}

sub fetch_config {
#I'm hoping that this function will go and is a temporary bridge
#until we get rid of %myconfig elsewhere in the code

    my ($self, $login) = @_;

    if ($login ne "") {
  
        # use central db
        my $dbh = ${LedgerSMB::Sysconfig::GLOBALDBH};
  
        # for now, this is querying the table directly... ugly 
        my $fetchUserPrefs = $dbh->prepare("SELECT acs, address, businessnumber,
                                                   company, countrycode, currency,
                                                   dateformat, dbdriver, dbhost, dbname, 
                                                   dboptions, dbpasswd, dbport, dbuser, 
                                                   email, fax, menuwidth, name, numberformat, 
                                                   password, print, printer, role, sid, 
                                                   signature, stylesheet, tel, templates, 
                                                   timeout, vclimit, u.username
                                              FROM users_conf as uc, users as u
                                             WHERE u.username =  ?
                                               AND u.id = uc.id;");

        $fetchUserPrefs->execute($login);

        my $userHashRef = $fetchUserPrefs->fetchrow_hashref;

        while ( my ($key, $value) = each(%{$userHashRef}) ) {
            $myconfig{$key} = $value;
        }

        if(! int($myconfig{'dbport'})){#in case there's a space or junk in the dbport
            $myconfig{'dbport'} = '5432';
        }

        $myconfig{'login'} = $login;
        $myconfig{'dbconnect'} = 'dbi:Pg:dbname='.$myconfig{'dbname'}.';host='.$myconfig{'dbhost'}.';port='.$myconfig{'dbport'};
    }
 
    return \%myconfig;
}

sub login {

    my ($self, $form) = @_;

    my $rc = -1;
  
    if ($self->{login} ne "") {
        if (! Session::password_check($form, $form->{login}, $form->{password})) {
            return -1;
        }

        #this is really dumb, but %myconfig will have to stay until 1.3    
        while ( my ($key, $value) = each(%{$self}) ) {
            $myconfig{$key} = $value;
        }

        # check if database is down
        my $dbh = DBI->connect(
            $myconfig{dbconnect}, $myconfig{dbuser}, 
            $myconfig{dbpasswd}) 
                or $self->error(__FILE__.':'.__LINE__.': '.$DBI::errstr);

        # we got a connection, check the version
        my $query = qq|
            SELECT value FROM defaults 
             WHERE setting_key = 'version'|;
        my $sth = $dbh->prepare($query);
        $sth->execute || $form->dberror(__FILE__.':'.__LINE__.$query);

        my ($dbversion) = $sth->fetchrow_array;
        $sth->finish;

        # add login to employee table if it does not exist
        # no error check for employee table, ignore if it does not exist
        my $login = $self->{login};
        $login =~ s/@.*//;
        $query = qq|SELECT id FROM employee WHERE login = ?|;
        $sth = $dbh->prepare($query);
        $sth->execute($login);

        my ($id) = $sth->fetchrow_array;
        $sth->finish;

        if (! $id) {
            my ($employeenumber) = 
                $form->update_defaults(
                    \%myconfig, "employeenumber", $dbh);
      
            $query = qq|
                INSERT INTO employee 
                            (login, employeenumber, name, 
                            workphone, role)
                     VALUES (?, ?, ?, ?, ?)|;
            $sth = $dbh->prepare($query);
            $sth->execute(
                $login, $employeenumber, $myconfig{name},
                $myconfig{tel}, $myconfig{role});
        }
        $dbh->disconnect;

        $rc = 0;

    
        if ($form->{dbversion} ne $dbversion) {
            $rc = -3;
            $dbupdate = (calc_version($dbversion) 
                < calc_version($form->{dbversion}));
        }

        if ($dbupdate) {
            $rc = -4;

            # if DB2 bale out
            if ($myconfig{dbdriver} eq 'DB2') {
                $rc = -2;
            }
        }
    }

    $rc;
  
}


sub check_recurring {
    my ($self, $form) = @_;

    my $dbh = DBI->connect(
        $self->{dbconnect}, $self->{dbuser}, $self->{dbpasswd}) 
            or $form->dberror(__FILE__.':'.__LINE__);

    my $query = qq|
        SELECT count(*) FROM recurring
         WHERE enddate >= current_date AND nextdate <= current_date|;
    ($_) = $dbh->selectrow_array($query);
  
    $dbh->disconnect;

    $_;

}


sub dbconnect_vars {
    my ($form, $db) = @_;
  
    my %dboptions = (
        'Pg' => {
            'yy-mm-dd' => 'set DateStyle to \'ISO\'',
            'mm/dd/yy' => 'set DateStyle to \'SQL, US\'',
            'mm-dd-yy' => 'set DateStyle to \'POSTGRES, US\'',
            'dd/mm/yy' => 'set DateStyle to \'SQL, EUROPEAN\'',
            'dd-mm-yy' => 'set DateStyle to \'POSTGRES, EUROPEAN\'',
            'dd.mm.yy' => 'set DateStyle to \'GERMAN\''
            }
        );


    $form->{dboptions} = $dboptions{$form->{dbdriver}}{$form->{dateformat}};

    $form->{dbconnect} = "dbi:$form->{dbdriver}:dbname=$db";


    if ($form->{dbhost}) {
        $form->{dbconnect} .= ";host=$form->{dbhost}";
    }
    if ($form->{dbport}) {
        $form->{dbconnect} .= ";port=$form->{dbport}";
    }
  
}


sub dbdrivers {

    my @drivers = DBI->available_drivers();

        #  return (grep { /(Pg|Oracle|DB2)/ } @drivers);
    return (grep { /Pg$/ } @drivers);

}


sub dbsources {
    my ($self, $form) = @_;

    my @dbsources = ();
    my ($sth, $query);
  
    $form->{dbdefault} = $form->{dbuser} unless $form->{dbdefault};
    $form->{sid} = $form->{dbdefault};
    &dbconnect_vars($form, $form->{dbdefault});

    my $dbh = DBI->connect(
        $form->{dbconnect}, $form->{dbuser}, $form->{dbpasswd}) 
            or $form->dberror(__FILE__.':'.__LINE__);


    if ($form->{dbdriver} eq 'Pg') {

        $query = qq|SELECT datname FROM pg_database|;
        $sth = $dbh->prepare($query);
        $sth->execute || $form->dberror(__FILE__.':'.__LINE__.$query);
    
        while (my ($db) = $sth->fetchrow_array) {

            if ($form->{only_acc_db}) {

                next if ($db =~ /^template/);

                &dbconnect_vars($form, $db);
                my $dbh = DBI->connect(
                    $form->{dbconnect}, $form->{dbuser}, 
                    $form->{dbpasswd}) 
                        or $form->dberror(__FILE__.':'.__LINE__);

                $query = qq|
                    SELECT tablename FROM pg_tables
                     WHERE tablename = 'defaults'
                       AND tableowner = ?|;
                my $sth = $dbh->prepare($query);
                $sth->execute($form->{dbuser}) 
                    || $form->dberror(__FILE__.':'.__LINE__.$query);

                if ($sth->fetchrow_array) {
                    push @dbsources, $db;
                }
                $sth->finish;
                $dbh->disconnect;
                next;
            }
            push @dbsources, $db;
        }
    }

    $sth->finish;
    $dbh->disconnect;
  
    return @dbsources;

}


sub dbcreate {
    my ($self, $form) = @_;

    my %dbcreate = ( 'Pg' => qq|CREATE DATABASE "$form->{db}"| );

    $dbcreate{Pg} .= " WITH ENCODING = '$form->{encoding}'" 
        if $form->{encoding};
  
    $form->{sid} = $form->{dbdefault};
    &dbconnect_vars($form, $form->{dbdefault});
    # The below line connects to Template1 or another template file in order
    # to create the db.  One must disconnect and reconnect later.
    if ($form->{dbsuperuser}){
        my $superdbh = DBI->connect(
            $form->{dbconnect}, 
            $form->{dbsuperuser}, 
            $form->{dbsuperpasswd}) 
                or $form->dberror(__FILE__.':'.__LINE__);
        my $query = qq|$dbcreate{$form->{dbdriver}}|;
        $superdbh->do($query) || $form->dberror(__FILE__.':'.__LINE__.$query);
    
        $superdbh->disconnect;  
    }
    #Reassign for the work below

    &dbconnect_vars($form, $form->{db});
  
    my $dbh = DBI->connect(
        $form->{dbconnect}, 
        $form->{dbuser}, 
        $form->{dbpasswd}) 
            or $form->dberror(__FILE__.':'.__LINE__);
    if ($form->{dbsuperuser}){
        my $superdbh = DBI->connect(
            $form->{dbconnect}, 
            $form->{dbsuperuser}, 
            $form->{dbsuperpasswd}) 
                or $form->dberror(__FILE__.':'.__LINE__);
        # JD: We need to check for plpgsql, 
        # if it isn't there create it, if we can't error
        # Good chance I will have to do this twice as I get 
        # used to the way the code is structured

        my %langcreate = ( 'Pg' => qq|CREATE LANGUAGE plpgsql|);
        my $query = qq|$langcreate{$form->{dbdriver}}|;
        $superdbh->do($query);
        $superdbh->disconnect;
    }
    # create the tables
    my $dbdriver = 
        ($form->{dbdriver} =~ /Pg/) 
        ? 'Pg' 
        : $form->{dbdriver};
  
    my $filename = qq|sql/Pg-database.sql|;
    $self->process_query($form, $dbh, $filename);
  
    # load gifi
    ($filename) = split /_/, $form->{chart};
    $filename =~ s/_//;
    $self->process_query($form, $dbh, "sql/${filename}-gifi.sql");
 
    # load chart of accounts
    $filename = qq|sql/$form->{chart}-chart.sql|;
    $self->process_query($form, $dbh, $filename);

 
    # create custom tables and functions
    my $item;
    foreach $item (qw(tables functions)) {
        $filename = "sql/${dbdriver}-custom_${item}.sql";
        if (-f "$filename") {
            $self->process_query($form, $dbh, $filename);
        }
    }
  
    $dbh->disconnect;

}



sub process_query {
    my ($self, $form, $dbh, $filename) = @_;
  
    return unless (-f $filename);
  
    open(FH, "$filename") or $form->error(__FILE__.':'.__LINE__.": $filename : $!\n");
    $ENV{PGPASSWORD} = $form->{dbpasswd};
    $ENV{PGUSER} = $form->{dbuser};
    $ENV{PGDATABASE} = $form->{db};
    
    open(PSQL, "| psql") or $form->error(__FILE__.':'.__LINE__.": psql : $! \n");
    print PSQL "\\o spool/log \n";
    while (<FH>){
        print PSQL $_;
    }
    close FH;
 
}
  


sub dbdelete {
    my ($self, $form) = @_;

    $form->{sid} = $form->{dbdefault};
    &dbconnect_vars($form, $form->{dbdefault});
    my $dbh = DBI->connect(
        $form->{dbconnect}, $form->{dbuser}, $form->{dbpasswd}) 
            or $form->dberror(__FILE__.':'.__LINE__);
    my $query = qq|DROP DATABASE "$form->{db}"|;
    $dbh->do($query) || $form->dberror(__FILE__.':'.__LINE__.$query);

    $dbh->disconnect;

}
  


sub dbsources_unused {
    my ($self, $form, $memfile) = @_;

    my @dbexcl = ();
    my @dbsources = ();
  
    $form->error(__FILE__.':'.__LINE__.": $memfile locked!") if (-f "${memfile}.LCK");
  
    # open members file
    open(FH, "$memfile") or $form->error(__FILE__.':'.__LINE__.": $memfile : $!");

    while (<FH>) {
        if (/^dbname=/) {
            my ($null,$item) = split /=/;
            push @dbexcl, $item;
        }
    }

    close FH;

    $form->{only_acc_db} = 1;
    my @db = &dbsources("", $form);

    push @dbexcl, $form->{dbdefault};

    foreach $item (@db) {
        unless (grep /$item$/, @dbexcl) {
            push @dbsources, $item;
        }
    }

    return @dbsources;

}


sub dbneedsupdate {
    my ($self, $form) = @_;

    my %dbsources = ();
    my $query;
  
    $form->{sid} = $form->{dbdefault};
    &dbconnect_vars($form, $form->{dbdefault});

    my $dbh = DBI->connect(
        $form->{dbconnect}, $form->{dbuser}, $form->{dbpasswd}) 
            or $form->dberror(__FILE__.':'.__LINE__);

    if ($form->{dbdriver} =~ /Pg/) {

        $query = qq|
            SELECT d.datname 
              FROM pg_database d, pg_user u
             WHERE d.datdba = u.usesysid
                   AND u.usename = ?|;
        my $sth = $dbh->prepare($query);
        $sth->execute($form->{dbuser}) || $form->dberror(__FILE__.':'.__LINE__.$query);
    
        while (my ($db) = $sth->fetchrow_array) {

            next if ($db =~ /^template/);

            &dbconnect_vars($form, $db);
      
            my $dbh = DBI->connect(
                $form->{dbconnect}, $form->{dbuser}, 
                $form->{dbpasswd}) 
                    or $form->dberror(__FILE__.':'.__LINE__);

            $query = qq|
                SELECT tablename 
                  FROM pg_tables
                 WHERE tablename = 'defaults'|;
            my $sth = $dbh->prepare($query);
            $sth->execute || $form->dberror(__FILE__.':'.__LINE__.$query);

            if ($sth->fetchrow_array) {
                $query = qq|
                    SELECT value FROM defaults
                     WHERE setting_key = 'version'|;
                my $sth = $dbh->prepare($query);
                $sth->execute;
    
                if (my ($version) = $sth->fetchrow_array) {
                    $dbsources{$db} = $version;
                }
                $sth->finish;
            }
            $sth->finish;
            $dbh->disconnect;
        }
        $sth->finish;
    }



    $dbh->disconnect;
  
    %dbsources;

}


sub dbupdate {
    my ($self, $form) = @_;

    $form->{sid} = $form->{dbdefault};
  
    my @upgradescripts = ();
    my $query;
    my $rc = -2;
  
    if ($form->{dbupdate}) {
        # read update scripts into memory
        opendir SQLDIR, "sql/." or $form->error(__FILE__.':'.__LINE__.': '.$!);
        @upgradescripts = 
            sort script_version 
                grep /$form->{dbdriver}-upgrade-.*?\.sql$/, 
                    readdir SQLDIR;
        closedir SQLDIR;
    }


    foreach my $db (split / /, $form->{dbupdate}) {

        next unless $form->{$db};

        # strip db from dataset
        $db =~ s/^db//;
        &dbconnect_vars($form, $db);
    
        my $dbh = DBI->connect(
            $form->{dbconnect}, $form->{dbuser}, 
            $form->{dbpasswd}, {AutoCommit => 0}) 
                or $form->dberror(__FILE__.':'.__LINE__);

        # check version
        $query = qq|
            SELECT value FROM defaults
             WHERE setting_key = 'version'|;
        my $sth = $dbh->prepare($query);
        # no error check, let it fall through
        $sth->execute;

        my $version = $sth->fetchrow_array;
        $sth->finish;
    
        next unless $version;

        $version = calc_version($version);
        my $dbversion = calc_version($form->{dbversion});

        foreach my $upgradescript (@upgradescripts) {
            my $a = $upgradescript;
            $a =~ s/(^$form->{dbdriver}-upgrade-|\.sql$)//g;
      
            my ($mindb, $maxdb) = split /-/, $a;
            $mindb = calc_version($mindb);
            $maxdb = calc_version($maxdb);

            next if ($version >= $maxdb);

            # exit if there is no upgrade script or version == mindb
            last if ($version < $mindb || $version >= $dbversion);

            # apply upgrade
            $self->process_query($form, $dbh, "sql/$upgradescript");
            $dbh->commit;
            $version = $maxdb;
 
        }
    
        $rc = 0;
        $dbh->disconnect;
    
    }

    $rc;

}
  

sub calc_version {
  
    my @v = split /\./, $_[0];
    my $version = 0;
    my $i;
  
    for ($i = 0; $i <= $#v; $i++) {
        $version *= 1000;
        $version += $v[$i];
    }

    return $version;
  
}

  
sub script_version {
    my ($my_a, $my_b) = ($a, $b);
  
    my ($a_from, $a_to, $b_from, $b_to);
    my ($res_a, $res_b, $i);

    $my_a =~ s/.*-upgrade-//;
    $my_a =~ s/.sql$//;
    $my_b =~ s/.*-upgrade-//;
    $my_b =~ s/.sql$//;
    ($a_from, $a_to) = split(/-/, $my_a);
    ($b_from, $b_to) = split(/-/, $my_b);

    $res_a = calc_version($a_from);
    $res_b = calc_version($b_from);

    if ($res_a == $res_b) {
        $res_a = calc_version($a_to);
        $res_b = calc_version($b_to);
    }

    return $res_a <=> $res_b;
  
}

sub save_member {

    my ($self) = @_;

    # replace \r\n with \n
    for (qw(address signature)) { $self->{$_} =~ s/\r?\n/\\n/g }

    # use central db
    my $dbh = ${LedgerSMB::Sysconfig::GLOBALDBH};

    #check to see if the user exists already
    my $userCheck = $dbh->prepare("SELECT id FROM users WHERE username = ?");
    $userCheck->execute($self->{login});
    my ($userID) = $userCheck->fetchrow_array;
    my $userConfExists = 0;

    if($userID){
        #got an id, check to see if it's in the users_conf table
        my $userConfCheck = $dbh->prepare("SELECT password, 1 FROM users_conf WHERE id = ?");
        $userConfCheck->execute($userID);

        ($oldPassword, $userConfExists) = $userConfCheck->fetchrow_array;
    }
    else{
        my $userConfAdd = $dbh->prepare("SELECT create_user(?);");
        $userConfAdd->execute($self->{login});
        ($userID) = $userConfAdd->fetchrow_array;
    }

    if($userConfExists){

        # for now, this is updating the table directly... ugly 
        my $userConfUpdate = $dbh->prepare("UPDATE users_conf
                                               SET acs = ?, address = ?, businessnumber = ?,
                                                   company = ?, countrycode = ?, currency = ?,
                                                   dateformat = ?, dbdriver = ?,
                                                   dbhost = ?, dbname = ?, dboptions = ?, 
                                                   dbpasswd = ?, dbport = ?, dbuser = ?,
                                                   email = ?, fax = ?, menuwidth = ?,
                                                   name = ?, numberformat = ?,
                                                   print = ?, printer = ?, role = ?,
                                                   sid = ?, signature = ?, stylesheet = ?,
                                                   tel = ?, templates = ?, timeout = ?,
                                                   vclimit = ?
                                             WHERE id = ?;");

        $userConfUpdate->execute($self->{acs}, $self->{address}, $self->{businessnumber},
                                 $self->{company}, $self->{countrycode}, $self->{currency},
                                 $self->{dateformat}, $self->{dbdriver},
                                 $self->{dbhost}, $self->{dbname}, $self->{dboptions}, 
                                 $self->{dbpasswd}, $self->{dbport}, $self->{dbuser}, 
                                 $self->{email}, $self->{fax}, $self->{menuwidth},
                                 $self->{name}, $self->{numberformat}, 
                                 $self->{print}, $self->{printer}, $self->{role}, 
                                 $self->{sid}, $self->{signature}, $self->{stylesheet},
                                 $self->{tel}, $self->{templates}, $self->{timeout}, 
                                 $self->{vclimit}, $userID);
      

        if($oldPassword ne $self->{password}){
            # if they're supplying a 32 char password that matches their old password
            # assume they don't want to change passwords

            $userConfUpdate = $dbh->prepare("UPDATE users_conf
                                                SET password = md5(?)
                                              WHERE id = ?");

            $userConfUpdate->execute($self->{password}, $userID);

        }

    }
    else{

        my $userConfInsert = $dbh->prepare("INSERT INTO users_conf(acs, address, businessnumber,
                                                                   company, countrycode, currency,
                                                                   dateformat, dbdriver,
                                                                   dbhost, dbname, dboptions, dbpasswd,
                                                                   dbport, dbuser, email, fax, menuwidth,
                                                                   name, numberformat, print, printer, role, 
                                                                   sid, signature, stylesheet, tel, templates, 
                                                                   timeout, vclimit, id, password)
                                            VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 
                                                   ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 
                                                   ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, md5(?));");

        $userConfInsert->execute($self->{acs}, $self->{address}, $self->{businessnumber},
                                 $self->{company}, $self->{countrycode}, $self->{currency},
                                 $self->{dateformat}, $self->{dbdriver},
                                 $self->{dbhost}, $self->{dbname}, $self->{dboptions}, 
                                 $self->{dbpasswd}, $self->{dbport}, $self->{dbuser}, 
                                 $self->{email}, $self->{fax}, $self->{menuwidth},
                                 $self->{name}, $self->{numberformat}, 
                                 $self->{print}, $self->{printer}, $self->{role}, 
                                 $self->{sid}, $self->{signature}, $self->{stylesheet},
                                 $self->{tel}, $self->{templates}, $self->{timeout}, 
                                 $self->{vclimit}, $userID, $self->{password});
      
    }

    if (! $self->{'admin'}) {

        $self->{dbpasswd} =~ s/\\'/'/g;
        $self->{dbpasswd} =~ s/\\\\/\\/g;

        # format dbconnect and dboptions string
        &dbconnect_vars($self, $self->{dbname});

        # check if login is in database
        my $dbh = DBI->connect(
            $self->{dbconnect}, $self->{dbuser}, $self->{dbpasswd}, 
            {AutoCommit => 0}) 
                or $self->error($DBI::errstr);

        # add login to employee table if it does not exist
        my $login = $self->{login};
        $login =~ s/@.*//;
        my $sth = $dbh->prepare("SELECT id FROM employee WHERE login = ?;");
        $sth->execute($login);

        my ($id) = $sth->fetchrow_array;
        $sth->finish;
        my $employeenumber;
        my @values;
        if ($id) {

            $query = qq|UPDATE employee SET
            role = ?,
            email = ?, 
            name = ?
            WHERE login = ?|;

            @values = ($self->{role}, $self->{email}, $self->{name}, $login);

        } else {

            my ($employeenumber) = Form::update_defaults(
                "", \%$self, "employeenumber", $dbh);
            $query = qq|
                INSERT INTO employee 
                            (login, employeenumber, name, 
                            workphone, role, email, sales)
                    VALUES (?, ?, ?, ?, ?, ?, '1')|;
            
            @values = ($login, $employeenumber, $self->{name}, $self->{tel},
            $self->{role}, $self->{email})
        }

        $sth = $dbh->prepare($query);
        $sth->execute(@values);
        $dbh->commit;
        $dbh->disconnect;

    }
}


sub delete_login {
    my ($self, $form) = @_;

    my $dbh = DBI->connect(
        $form->{dbconnect}, $form->{dbuser}, $form->{dbpasswd}, 
        {AutoCommit => 0}) 
            or $form->dberror(__FILE__.':'.__LINE__);
  
    my $login = $form->{login};
    $login =~ s/@.*//;
    my $query = qq|SELECT id FROM employee WHERE login = ?|; 
    my $sth = $dbh->prepare($query);
    $sth->execute($login) || $form->dberror(__FILE__.':'.__LINE__.': '.$query);
  
    my ($id) = $sth->fetchrow_array;
    $sth->finish;
    
    my $query = qq|
        UPDATE employee 
           SET login = NULL,
               enddate = current_date
         WHERE login = ?|;
    $sth = $dbh->prepare($query);
    $sth->execute($login); 
    $dbh->commit;
    $dbh->disconnect;

}


sub config_vars {
  
    my @conf = 
        qw(acs address businessnumber company countrycode
        currency dateformat dbconnect dbdriver dbhost dbname dboptions
        dbpasswd dbport dbuser email fax menuwidth name numberformat
        password printer role sid signature stylesheet tel templates 
        timeout vclimit);

    @conf;

}


sub error {
    my ($self, $msg) = @_;

    if ($ENV{HTTP_USER_AGENT}) {
        print qq|Content-Type: text/html\n\n|.
            qq|<body bgcolor=ffffff>\n\n|.
            qq|<h2><font color=red>Error!</font></h2>\n|.
            qq|<p><b>$msg</b>|;

    }
  
    die "Error: $msg\n";
  
}


1;